Opened the drawer, took out the five-yuan red plum, and threw it to Yang Sen, while expressing a different opinion.

Lu Chuan actually didn't know that when he was away, Liu Guodong and the three of them basically didn't smoke the Huazi he put on the desk.

Unless someone from another office is coming.

The rest of the time, several people either smoke red plums or red rivers.

Lu Chuan, as a newcomer to the current survey office, took the initiative to scatter cigarettes and asked everyone to smoke expensive cigarettes, and everyone had no objection.

When they went to work back then, they also came over like this, but unlike Lu Chuan, they still couldn't afford Huazi at that time, and they smoked camel cigarettes for Master.

Yang Sen gave Lao Bai a roll of his eyes indifferently.

Take Lao Bai's cigarette, light it, cough cough.

"This smoke is more chong than Huazi."

"Nonsense, it's only a few bucks?"

Lao Bai didn't know that Hongmei was stronger than Huazi, and he still scratched his throat, but it was cheaper.

Yang Sen nodded, not only felt that what Lao Bai said about cigarettes was right, but also felt that his judgment on the facts of the case was correct, and the probability of a situation on the scene was the largest.

There was a case, and every office was actually discussing the case.

The field survey office is actually okay, after all, it is a technical background, although it has not been on the front line for many years, but all the reasoning and speculation are based on the findings of the field survey.

Not necessarily in other offices.

Civilian police gossip a little more.

"I remember it was a love killing, and I heard that the underwear on that corpse was more than a thousand!"

"Not necessarily, the corpse's coat is only a few dozen dollars, and everything is possible."

"Team Leader Sun has a black face today, and it is estimated that he has not gained anything."

"Hey, it's been a week since the case was filed, and I heard Brother Hui say that there is still no big progress......

The police are also people, civilian police officers who are engaged in internal service, and they also like to gossip when they go to work.

Subject to the limitations of the police industry itself, or the characteristics of the work, gossip is also a gossip case.

It's just that there is a specialization in the art industry, and the front-line reconnaissance side has to be an action group.

Most of the time, whatever they can think of, the action team will not let go.

Soon, a day without much harvest passed.

In the first two or three days of the case, everyone was still very nervous and very busy.

But a week passed, and there was no progress on the case, and everyone went about their jobs and started to deal with the other work at hand.

Except for Lu Chuan, who is busy in the investigation office, the others have no important work at hand, and the workload of the investigation of this case is relatively small.

Of course, Lu Chuan is not busy with the work of the current survey.

In recent days, everyone knows that Lu Chuan actually raises insects in the laboratory of the current survey.

A lot of people took the time to come and have a look.

Of course, when you come, you are in high spirits, and when you leave, you are pale.

This is not to blame Lu Chuan, these people have nothing to do to come over to see maggots, isn't this sick.

What's more, most of the people who come to see are internal police.

The scene has never been out, let alone watching maggots?.

Lu Chuan remembered that there were two police flowers in the office, and they seemed to vomit when they went out.

From this point of view, Forensic Medicine Shen has a natural advantage.

After all, the police flower who can discuss the topic of maggot breeding with Lu Chuan, and usually drinks coffee, the entire criminal investigation detachment is only Forensic Doctor Shen.

Early the next morning, Lu Chuan didn't bother to clean up his office when he got to work, and went straight to the current survey laboratory in the basement.

Today is the day of the emergence of the intermediate larvae he cultivated.

Combined with the time of the early emergence, as well as the larval stage that is growing, Lu Chuan was able to determine the time when these larvae were parasitic on the corpse.

That is, it is more accurate to lock the time of death of the victim.

More than fifty petri dishes, Lu Chuan arranged them in a row in order.

The growth status and emergence time of hemp fly larvae of different sizes in the Petri dish were recorded one by one.

The optimal cultivation temperature for hemp fly larvae is 24 to 28 degrees Celsius, and the relative humidity is 60 to 80 percent.

Fourteen hours of light a day, it can hatch in about a week.

The eggs can go dormant when the outside temperature and relative humidity do not meet the requirements for incubation.

Even at low temperatures, it can be stored for a week or even longer.

But the minimum temperature cannot be directly exposed to minus 10 degrees.

According to the experiments done by Lu Chuan, the results showed that the longest growth cycle of hemp fly larvae on the corpse was actually 36 days!

Thirty-six days, the whole life cycle of the average hemp fly is about one or two months.

Therefore, Lu Chuan judged that the eggs had traces of freezing.

At the first scene where the murderer threw his body, Lu Chuan did humidity data collection, combined with the recent temperature changes, to restore the external environment at that time.

If the murderer dumped the body as soon as the murder occurred, the time for the eggs to hatch should be eleven days.

But the reality is that the eggs hatch for 36 days.

After getting this conclusion, Lu Chuan can draw a positive conclusion.

After the victim's death, the killer did not immediately abandon the body.

The body was dumped eleven days ago, and the victim died thirty-six days ago!

Survey Office.

Liu Guodong's expression was solemn.

"Are you sure the body was refrigerated?"

Lu Chuan nodded affirmatively: "If it hadn't been refrigerated, it would have been impossible for the hemp fly eggs parasitic on the corpse to have a thirty-six day incubation period."

"But if the corpse had been refrigerated, wouldn't the eggs have frozen to death?"

"Low-temperature refrigeration, even sub-zero refrigeration, is not frozen."

"That's why the forensic doctor didn't find freezing during the autopsy."

Low-temperature refrigeration is actually what is often said to be freshness in life.

The freshness usually doesn't last too long, but because it's not completely frozen, there are basically no traces.

What's more, the body was found to be highly decomposed.

Qin Yong's office.

"You suspect that the body has been refrigerated?"

Liu Guodong nodded: "It's possible."

The analysis report of Lu Chuan's corpse parasite eggs was handed to Qin Yong, and Liu Guodong explained.

"This is a forensic entomological analysis report made by Lu Chuan based on the parasitic hemp fly eggs on the corpse."

Although Qin Yong has been a criminal policeman for a long time, this is the first time he has seen this thing.

"The hatching time for sparrow eggs is usually one to two weeks."

"According to the temperature, humidity and other conditions at the first site of the corpse disposal, it is estimated that the hatching time of the eggs should be 11 days."

"In order to verify the calculation, Lu Chuan has done several experiments this week, and there is a high probability that it will be fine."

"However, the eggs on the actual corpse have the longest incubation cycle of thirty-six days!"

"It is only possible to achieve such a long incubation time when the eggs are dormant when they are refrigerated."

"Thirty-six days...... So precise?"